Year	Number
2004-01-01	14.19544986
2005-01-01	14.93665424
2006-01-01	14.44194561
2007-01-01	13.19884874
2008-01-01	14.97297661
2009-01-01	15.33838763
2010-01-01	16.42965720
2011-01-01	17.62667938
2012-01-01	18.90195375